Magnet D (Built-in Magnet) Mounting B (Basic) Type N (Rubber Bumper) Bore 40mm Port Thread Type Rc (or M5, Depending on Style, Bore Size, and Thread Combination) Lube-retainer Without Stable Lubrication Function Stroke 55 Rod End Male Rod End Suffix for Cylinder w/o Rod Boot Pivot Bracket None Rod End Bracket None Auto Switch No Switch Lead Wire or Prewired Connector 0.5m (Or None in the Case of No Switch) Number 2 pcs. (Or None in the Case of No Switch)